Triangular lamp



FIG. 1 is a front view of a triangular lamp.

FIG. 2 is a perspective view.

FIG. 3 is a right side/front view.

FIG. 4 is a left side/front view.

FIG. 5 is a rear view.

FIG. 6 is a top view; and,

FIG. 7 is a bottom (or underside) view. 

The ornamental design for a triangular lamp, as shown and described. 